Your pocket notebook, upgraded.

Inspired by the classic pocket notebook used to track IOUs, we built an app that makes splitting bills painless. Snap receipts, claim what you ordered, and settle up fairly — no more awkward money conversations.

555 Notebook app — tablet view
555 Notebook app — trip list screen

Everything you need to split bills fairly

No more spreadsheets. No more "I'll pay you back later." Just fair, transparent splitting.

📷

Receipt Scanning

Snap a photo of any receipt — our AI extracts every item, price, and total automatically.

Claim-Based Splitting

Everyone taps on items they actually consumed. No more unfair equal splits on the pizza you didn't eat.

🤝

Smart Settlements

We calculate who owes whom and suggest the fewest transactions needed to settle up.

👥

Multi-Payer Receipts

Multiple people chipped in for one bill? No problem. Record exactly who paid what on a receipt, and we'll factor it into the balances.

📶

Offline Mode

Works without internet. Your trip data is cached locally and syncs when you're back online.

🌎

Multi-Currency

Supports 154 currencies. Perfect for international trips — set the currency per trip.

How it works

From group dinner to settled up, in four simple steps.

1

Create a Trip

Set currency, name your trip, and invite friends via QR code or share link.

2

Add Receipts

Snap a photo for AI extraction or add expenses manually. Both work great.

3

Claim Items

Everyone taps on what they consumed. Unclaimed items auto-split among the group.

4

Settle Up

See who owes whom, send reminders, and record payments. Done!

Simple, fair pricing

Most features are free. Credits unlock premium actions.

Always Free FREE
  • Manual receipts & expenses
  • Settlements & balance tracking
  • Item claiming & splitting
  • Editing receipts & expenses
  • CSV & PDF export
  • Join unlimited trips
  • Push notifications & nudges
  • Offline mode
Credits

10 free credits on signup. 1 credit for each:

  • Create a new trip
  • Scan a receipt (AI extraction)
  • Duplicate a trip

Earn free credits: invite a friend and you both get 5 credits when they create their first trip.

CreditsPrice (USD)
10 credits$1.00
20 credits$2.00
50 credits$5.00
100 credits$10.00 $9.00 -10%
500 credits$50.00 $40.00 -20%

Credits are purchased via Google Play Billing within the app.

Frequently Asked Questions

555 Notebook is a trip expense splitter inspired by the classic pocket notebook shopkeepers used to track debts. We turned that concept into a modern app that helps friend groups split bills fairly, item by item.

Just snap a photo of your receipt. Our AI model reads the merchant name, individual items, quantities, prices, and the total. It supports multilingual receipts and automatically translates item names to English. Scanning costs 1 credit. As with all AI features, results may occasionally contain errors — we recommend verifying extracted items.

Most apps do equal splits. 555 Notebook uses claim-based splitting — each person taps on exactly which items they consumed. This means if you only had a coffee while your friend ordered a burger and fries, you only pay for your coffee. Unclaimed items are auto-split among everyone.

Yes! Your trip data is cached locally so you can view balances, receipts, and expenses without internet. When you're back online, everything syncs automatically. An offline banner appears to let you know when you're disconnected.

We support 154 ISO 4217 currencies including USD, EUR, GBP, JPY, SGD, THB, MYR, and many more. Each trip has its own currency, making it perfect for international travel.

Absolutely. All data is encrypted in transit (HTTPS), passwords are hashed with bcrypt, and authentication tokens are securely stored. We don't sell your data. You can delete your account at any time, and we'll remove all your personal information. See our Privacy Policy for details.

You get 10 free credits when you sign up. Credits are used for creating trips (1 credit), scanning receipts with AI (1 credit), and duplicating trips (1 credit). Everything else — manual receipts, expenses, settlements, and joining trips — is completely free. Top-up starts at $1.00 for 10 credits, with bulk discounts up to 20% off on larger packages.

Yes — refer a friend. Share your invite code from Profile → Refer a Friend. When your friend signs up with your code and creates their first trip, you both receive 5 bonus credits. You can earn referral bonuses for up to 50 friends.

What's New

v1.0.7

Always-fresh data, instant re-open, a warmer dark mode & sharing polish

  • Your data stays fresh — new top-ups, expenses, settlements, and activity now show up the moment you open a screen, no pull-to-refresh needed
  • Re-opening the app is instant — if you're signed in, you go straight to your trips instead of seeing the sign-in screen flash by
  • Dark mode now matches the notebook's warm look — cosy paper tones instead of cool blues, with clearer cards and badges
  • Cleaner manual receipts — amount fields now show your trip's currency, and the line-item columns are tidier
  • Inviting a friend now shares a one-tap link that opens the app (or installs it) with your code ready to use, and spells out the 5 free credits you both get
  • A more polished first run, plus consistent layouts that read correctly in both portrait and landscape
  • The onboarding buttons on the last intro page no longer get stuck
  • The app-launch logo no longer visibly shrinks as the app opens
  • On the top-up screen, the "Best value" and discount badges on the 500-credit pack no longer overlap the price
v1.0.6

Smoother onboarding, faster sign-in & trip polish

  • "Replay app tour" in Settings — revisit the walkthrough whenever you like
  • A "Split unequally" shortcut makes custom split amounts easy to find
  • Verification codes from your email now auto-fill and submit themselves
  • A friendlier first run that lets you explore the demo trip before creating your own
  • Clearer trip management — "Finalize Trip", a fixed-currency note, and tap-to-copy invite codes
  • "Quiet hours" stays visible (with a hint) when notifications are off
  • Home-screen trip balances refresh after you settle up
  • Spending charts on long trips scroll so the bars stay readable
v1.0.5

Notifications & display fixes

  • Receipt amounts in the receipts list now show your trip's currency instead of a bare number
  • Turning on notifications when you create your first trip now works right away — no need to sign out and back in
  • "Receipt ready" notifications now have their own icon and open the receipt when tapped
  • "Mark all read" now sits just below the header and only shows when you have unread notifications
  • The discount and price badges on the larger credit packs no longer crowd each other
v1.0.4

Landscape fixes

  • Buttons and lists no longer hide behind the navigation bar in landscape — the Settle and Delete buttons in Trip Settings are now fully tappable
  • The credits intro now fits the screen in landscape instead of getting cut off
v1.0.3

Fixes & polish

  • Privacy, Terms, and Disclaimer links now open correctly
  • Fixed the trip "Share" invite link
  • More reliable sign-in with clearer error messages and recovery
  • Transparent Google logo on the sign-in button in dark mode
v1.0.2

Faster settling up

  • Tap a balance to record that payment instantly — the amount and person are filled in for you
  • One-tap suggested settlements right on the Balances tab
  • Nudge someone who owes you straight from their balance row
  • Clearer Google sign-in messages when something goes wrong
v1.0.1

Reliability & polish

  • More reliable credit purchases — interrupted top-ups now recover automatically on next launch
  • Clearer top-up screen with upfront pricing details
  • Improved receipt scanning accuracy and resilience
  • Smoother sign-in and notification handling
v1.0.0

Initial release (closed testing)

  • AI receipt scanning with multilingual support
  • Claim-based and custom expense splitting
  • Smart settlement suggestions
  • Multi-payer receipts and expenses
  • 154 currencies supported
  • Offline mode with auto-sync
  • Push notifications and nudge reminders
  • Trip activity feed, recap charts, and CSV/PDF export
  • Google Sign-In and credit system
  • Refer-a-friend bonus credits
  • Dark mode

Ready to split smarter?

Download 555 Notebook and start splitting expenses the fair way.